The Leo Envelopes DLB Manilla Self Seal No Window 25 Pack features standard business mailing jackets measuring 110x220mm. Durable 80gsm brown paper ensures everyday post room utility. A quick peel-and-seal flap eliminates the need for moisture. It accommodates an A4 sheet folded cleanly in thirds. The solid, windowless layout completely safeguards personal data privacy. It serves as an essential, cost-effective accounting office staple.